Ohio Revised Code Title XLIX. Public Utilities § 4909.21

(1) Of a length of thirty-six and seven-tenths feet or under, the rate charged shall be on a basis of a minimum weight of not more than sixteen thousand pounds for single-deck cars, and twenty-two thousand pounds for double-deck cars;

(2) Of a length exceeding thirty-six and seven-tenths feet, and not more than forty feet, the rate charged shall be on a basis of minimum weight of not more than seventeen thousand pounds for single-deck cars, and twenty-three thousand pounds for double-deck cars;

(3) Over forty feet in length the rate charged shall be on a basis of a minimum weight of not exceeding eighteen thousand pounds for single-deck cars and twenty-four thousand pounds for double-deck cars.